Ground Noise

Dear Geepherder,

Measuring the resistance will be a piece of cake then, the battery and my ground are less then 3 feet apart. Thanks...

Now the common ground theory will be another story. Nearly all of the grommets leading into the firewall of my car are blocked by a 21 gallon gas tank. I ran all of my rca's around this, and to be honest I would have no clue how to run a new ground wire away from this area. I have to keep this new ground wire seperate from my rca's right?

Thanks 12volters for all of your help. I will get out to purchase a multi-meter today or tomrrow; then post my results!

Drew

Dear Members,

I measured the ground resistance using a multi meter. At the RX-1 setting it measured just less then 3 OHM's. If the ground must be a 1/2 or less, am I really high over the limit? I already moved the ground from the battery terminal, should I look to cut back on the noise from someplace else? Thanks again members for all of your time on this...

Drew

Yeah, what DYohn said.  I agree completely.

I do have a 4 gauge ground connected to a stinger distribution block; then there's 8 gauge running from the block to all 3 components. I definitely think the wire is a sufficient ground for my system.  So I will pull everything out and work on lowering the ground resistance. Thanks again 12 volters for all of your helpfull posts...

Drew

Update on the ground resistance.

Every single area in which I attempted to move the ground to, of the Porsche's chasis, has a resistance of 2 1/2 ohm's grounded to the battery. Is there anything else I can do to try and clean the noise up?

Thanks forum for all of your help on this...

Drew

I have encountered a noisy 5303 and 5303R before and it was an internal grounding issue. Is this a new install into the Porsche or did it just occur? Keep working on the grounding issues to get that return resistance as low as possible. It may be necessary to upgrade the factory battery to chassis ground to improve things. If you have a cd player that you can borrow from someone, that is the next place that I would start, eliminate the source as being the issue. Try unplugging the antenna from the cd player as well to see if the noise goes away. Unmount the amplifiers and place on some cardboard to test as well, a ground loop can be as simple as the casing of the amp going to ground through the mounting screw.

Dear Forbidden,

The 5303R was fixed under factory warranty 2 years ago... But the funny thing is, the ground noise is a lot less noticable when you play the radio... The amps are mounted on MDF which is elevated by the spare tire... This is a new install...

Drew

Can I reground the alternator solely by itself somewhere in the engine compartment, like to the strut tower? Would that help?

Drew